无蔓南瓜对外源GA3 处理的生理反应

 研究了0.6 mmol·L ^{- 1}赤霉素GA₃对无蔓南瓜叶片的叶绿素含量以及叶片和节间的过氧化氢酶、愈创木酚过氧化物酶、超氧化物歧化酶、α - 淀粉酶和酸性磷酸酯酶的活性的影响。结果表明, 处理后的前3天, 叶片中叶绿素含量没有明显改变; 第6天处理的叶片中叶绿素含量极显著低于对照的。赤霉素处理对无蔓南瓜节间中α - 淀粉酶活性、过氧化氢酶活性和超氧化物歧化酶活性影响在第3天(或第1～3天) 提高显著; 到第6天, 酸性磷酸酯酶活性逐渐增强; 第9天, 过氧化物酶活性开始逐渐提高。

Physiological Response of Dwarf Pumpkin on Exogenous GA3 Treatment

We studied the physiological influence of exogenous GA₃ on‘Wuman 1’. The chlorophyll content and the activities of catalase (CAT) , guaiacol peroxidase (G-POD) , superoxide dismutase ( SOD) ,α-amylase and acid phosphatase were compared between control and treated pumpkin plants with GA₃. The results showed that the chlorophyll content had no significant change in pumpkin leaves in three day after treatment with GA₃ ; The chlorophyll content in treated pumpkin leaves was significantly decreased in treated pumpkin leaves on the sixth day after treatmentwith GA₃; The activities of α-amylase, CAT and SOD were increased in three days after treatment, and the activities of acid phosphatase and G-POD were gradually increased in six days and nine days after treatment, respectively.